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Technical Snapshot of DN800 EN10217 P355NH ERW Pipes
| Item | Specification |
|---|---|
| Product Type | ERW Steel Pipe |
| Nominal Diameter | DN800 (813 mm) |
| Standard | EN 10217 |
| Steel Grade | P355NH |
| Process | High Frequency Welding |
High-strength pressure-grade steel ensuring structural reliability under heavy-duty load conditions.
Material Characteristics and Heavy Structural Performance
P355NH is a normalized fine-grain pressure vessel steel with a minimum yield strength of 355 MPa and tensile strength typically ranging from 490 to 630 MPa. Carbon content is generally controlled below 0.20 percent, while manganese is maintained around 1.00–1.60 percent to ensure a balance of strength and toughness. The "NH" designation indicates suitability for elevated temperature service with mandatory impact testing, ensuring resistance to brittle fracture under stress.
Huayang Steel Pipe manufactures DN800 ERW pipes using advanced high-frequency welding technology, achieving a uniform weld seam and stable metallurgical structure. Precision forming ensures accurate diameter control and consistent wall thickness. Each pipe undergoes ultrasonic inspection, hydrostatic testing, and mechanical verification, ensuring dependable performance in heavy-duty structural and pressure-related engineering applications.
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